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<details id="dt1"><summary>new 1</summary></details>
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<details id="dt3"><summary>new 2</summary><summary>new 1</summary></details>
<details id="dt3c" open><summary>new 2</summary><summary>new 1</summary></details>
<details id="dt4"><summary>summary</summary><summary>new 1</summary></details>
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<details id="dt5"><summary>new 1</summary><summary>summary</summary></details>
<details id="dt5c" open><summary>new 1</summary><summary>summary</summary></details>
<details id="dt6" open><summary>new 1</summary></details>
<details id="dt6c"><summary>new 1</summary></details>
<details id="dt7" open><summary>new 1</summary><summary>new 2</summary></details>
<details id="dt7c"><summary>new 1</summary><summary>new 2</summary></details>
<details id="dt8" open><summary>new 2</summary><summary>new 1</summary></details>
<details id="dt8c"><summary>new 2</summary><summary>new 1</summary></details>
<details id="dt9" open><summary>summary</summary><summary>new 1</summary></details>
<details id="dt9c"><summary>summary</summary><summary>new 1</summary></details>
<details id="dt10" open><summary>new 1</summary><summary>summary</summary></details>
<details id="dt10c"><summary>new 1</summary><summary>summary</summary></details>
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